Step 1: Prepare the Chicken - Place the chicken breasts into an 8 quart crock pot. Sprinkle the dried parsley, onion powder, and garlic salt evenly over the top to season the meat.
Step 2: Add the Creamy Mixture - Spoon the sour cream and cream of chicken soup over the chicken. Stir gently and spread the mixture evenly to ensure the chicken is fully coated.
Step 3: Sprinkle the Onions - Scatter the diced onions over the creamy layer. As they cook, they soften and infuse the dish with savory flavor.
Step 4: Prepare the Stuffing - In a medium sized bowl, combine the melted butter with the stuffing mix. Stir until the stuffing is evenly coated and lightly moistened.
Step 5: Layer the Stuffing - Pour the buttered stuffing mixture evenly over the creamy chicken layer. Do not stir, as this allows the stuffing to absorb the flavors while cooking.
Step 6: Slow Cook to Perfection - Cover the crock pot and cook on low for 6 hours. The chicken will become tender, and the stuffing will turn moist and flavorful.
Step 7: Garnish and Serve - Sprinkle freshly chopped parsley on top before serving. Pair with vegetables and mashed potatoes for a comforting, complete meal.